brotan



No. 62|,442. Patented Mar.' 2|, 1899.

JV. BRQTAN.

STEAM GENERATOR.

(Applicatim med Dec. 1s, 189e.) (No Mudel.) 4 Sheets-Sheet l.

Patented Ma'r. 2|, |899.4

'.LfBRoTAN. STEAM GENERATOR. (Applirrxe-'ion4 filed Duc. 13, 1898.5

4 Ysheets-snm,` 2.

(No Model.)

No. 62l,442. Patented Mar. 2|, |899. J. BHOTAN.

STEAM GENERATOR.

(Application Bled. Dec. 13, 189B.) 4 (No Model.) 4 Sheets-Sheet 3v No., wnsmuoww u c No. 62|,442. Patented Mar. 2|, |899. J. BHOTAN.

STEAM GENERATOR.

(Application filed Dec. 13, 1898.5 (Nn Model.) 4 Sheets-Sheet 4.

mi: Nonm's P'ens co. Pnorammo.. WASHINGTON. 0.1::

` Nrrnn STATES lPATENT trios@ STEAM-GENERATOR.

SPECIFICATION forirliiig` part of Letters Patent No. 621,442, dated March 21, 1899.

Application filed December 13, 1898. Serial No. 699,148. (No model.)

To all whom t may concern:

Beit known that I, JOHANN BRo'rAN, a subject of the Emperor of Austria-Hungary, residing at Linz, in the Province of Upper Austria, in the Empire of Austria-Hungary, have invented certain new and useful Improvements in Steam-Generators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference'being had to the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

This invention has reference to improvements in locomotive steam-generators, which may also be constructed as stationary highvpressure steam-generators, as ship or torpedoboat engines, and as locomobile steam-generators. According thereto the fire-box is composed of bent tubes, which communicate with each other and also with the Water-space and steam-space of the longitudinal boiler and which are arranged closely in contact with one another and form a closed domed surface which, in conjunction with the tube-plate of the longitudinal boiler, incloses the fire-space above the grate in a box-like manner. These tubes thus form in their entirety a vertical boiler, which is inclosed by the outer casing of the fire-box.

In the accompanying drawings, Figures l to 3 are respectively a longitudinal section, a vertical cross-section, and a partial horizontal section of a steam-generator provided with a fire-box of this kind.A Figs. 4, 5, and

6 are separate views illustrating the attachment of the tubes to one lanother, and Figs.

1 7, 8, 9, and l0 are longitudinal and cross sections illustrating different forms of steamcollectors and their connection with the longitudinal boiler. Fig. 11 shows the connections of the lire-box tubes mad-e in two parts with the forward head of the steam-collector, and Figs. 12, 13, and 14C represent a modified form of arrangement of the generator shown in Figs. l to 3.

The fire-box, which forms the vertical boilerl II and is connected with the nre-tube boiler however, not subjected to steam-pressure and can therefore be made of thin metal plate.. Its walls are provided at their lower portions with a horizontal angle-iron frame a, which may, however, be inclined toward the rear wallof the iire-box. In this frame there is mounted right and left the bottom tube b, which may be made in one or in two parts and which is suitably bent.

The bottom tube, which when made in two parts is closed under the fire-door, opens by means of the cleaning-u nion c in the rear wall of the vertical boiler, or it may be so arranged as to open in the longitudinal boiler either direct or by means of a water-pocket.

The bottom pipe is provided on its upper side and along its whole length with screwed unions u, which are situated very close together. The unions, which are situated symmetrically on both sides of the vertical central plane of the fire-box, are connected in pairs by means of bent pipes d cl2, which, if necessary, may be made in two parts (see Fig. 11) and which extend upward along the walls of the outer jacket M and along the domed top of the same. The pipe d', which is situated nearest to the longitudinal boiler R and which may be made in two parts, ex-

-tends close along the tube-plate of the saine and leaves the fire-tube openings in the said tube-plate free. The next following pipes d2 d3 d20 dm are situated close together, and their upper bent portions are made either all of the same height to suit the form of the top of the jacket or they are arranged gradually deeper toward the front wall.

Along the front wall the pipes are arranged in concentric rows, the innermost one of which surrounds the fire-door opening. Spaces y and y are left free under the fire-door and at the rear Wall of the fire-box are lined with fire'- bricks, but may be diminished or even entirely dispensed with by suitable Aarrangements of the pipes.

The connections are preferably effected by means of sleeve-nuts having right and left hand threads or` by a tight joint being made by means of rings or of a packing of copper wire. They are screwed upon the (if necessary) contracted ends of the fire-box tubes d cl2 and upon the unions of the bottom tube. The sleeves can be fixed in their tightenedup position by means of screwed pins fu. The

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-of the dam per.

fire-box tubes may also be simply expanded in the bottom tube if on the opposite side of the bottom tube suitable apertures will be provided.

For the purpose of preventing a warping of the fire-box tubes and the radiation of large quantities of heat to the exterior the said tubes are provided each with two ribs r, Fig. 5, which are screwed or riveted to the adjacent ribs of the adjacent tubes with intermediate packings. \Vhen using rolled tubes, they are provided with lugs l, Fig. 4, which are welded or brazed thereto. In the latter case the jointing is preferably effected in the manner shown in Fig. G and is calked moderately on both sides.

Each fire-box tube carries at its highest point a discharge-pipe c or e e2 es, leading to the steam-eollector. The discharge-pipe e, issuing from the front wall, may be arranged to open into a casing t', which communicates with the water and steam space. When the 1ire-box tubes are made in two parts, each part ofthe tube maybe provided with adischarge-pipe or may be arranged to open direct in the steam-collector or in its forward head by suitably bending the lire-box tubes. (See Fig. ll.) The highest iire-lineff, Fig. l, is determined by the highest places of contact of the lire-box tubed (l2, dsc.

Water is supplied from the waterpocket s or the longitudinal boiler by means of the pipes 7L. The boiler can be completely emptied by means of pipes g, which branch off from the bottom tube and which lead to the discharge cockv t. When the bottom tube opens direct into the longitudinal boiler or into the water-pocket of the same, water-discharge cocks may be arranged on both sides of the tube.

The grate is arranged in such a manner that its surface 7; 7a' is situated above the pipecouplings. The fire-screen maybe mounted upon the masonry of the rear wall 7j'.

rIhe space between the walls of the jacket M and the tubes d cl2, tbc., may be either filled up with insulating material-such as asbestos, slag-wool, or kieselguhr-or may be utilized for consuming smoke. In the latter case there are bored at the places of contact of the fire-box tubes numerous sm all holes n, Figs. 4 and 5, which serve to connect the airspace between the wall of the jacket and the {ire-box tubes with the tire-space. 0n both sides of the vertical boiler there is provided above the frame a a slide or damper S,which allows the outer air to enter between the jacket and the tubes, and which air after having been highly heated is blown into the lire in the form of fine jets from all sides, the amount of air being regulated by the position This air, which is drawn in through the damper-apertures q and which is highly heated by contact with the walls of the lire-box tubes, effects the most perfect possible combustion of the smoke-gases. To increase this action, there is preferably provided a lire-screen, the masonry of which is built of hollow bricks, the recesses of which communicate with the air-space a, situated behind the masonry, While their sides facing the grate are provided with small holes.

The steam-collector D is preferably provided with a forward head V, into which the steam is discharged by the pipes d d2, (be. On this forward head any suitable number of washing-out holes may be provided. The steam-collector may also be provided with a dome and is either mounted directly upon the longitudinal boiler R, as shown in Figs. l and 2, or it is made of cylindrical shape, as shown in Figs. 7 and 8, or it is mounted saddle fashion over the longitudinalboiler, as

vshown in Figs. 9 and l0.

In the modified form shown in Figs. l2 to 14 the arrangement of a separate steam-collector is dispensed with, the forward head V being iitted direct upon the tube-wall of the fire-box, which similarly to the arrange'- ment previously described is surrounded by a jacket.

l. rThe combination with a tubular boiler, of a ire-box having its side, top and front walls formed of closely-arranged pipes, the upper and lower terminals of which respectively communicate with the steam and water spaces of the boiler, the pipes constituting the front wall of thc tire-box arranged to leave a fuel-feed opening above the grate, and the pipes nearest the tube-sheet of the boiler f1tting snugly against said sheet, for the purpose.

set forth.

2. The combination with a tubular boiler, of a fire-box having its side, top and front Walls formed of closely-arranged pipes, the upper and lower terminals of which respectively communicate with the steam an d water spaces of the boiler, the pipes constituting the front wall arranged to form a fuel-feed opening above the grate, the pipes nearest the tube-sheet of the boiler fitting snugly against the same, said pipes having flat contacting faces to form practically tight joints between them, for the purposes set forth.

3. The combination with a tubular boiler IOO IOS

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and its lire-box, having its side, top and front I trolling the admission of air to said chamber,

for the purposes set forth.

4. The combination with a tubular boiler, its fire-box constructed of pipes in close contact with one an other and with the tube-sheet of the boiler, the upper and lower ends of said pipes respectively :in communication with the steam and water spaces of the boiler, and air-ports between the pipes constituting the side wall or walls of the fire-box, opening into thelatter above the grate; of a jacket inclosing the lire-box to form an air-chamber between the two, air-ports in the side wall or walls of said jacket, and meansv for controlling the passage of air through the jacketports, for the purpose set forth.

5. The combination with a tubular boiler, of a fire-box whose top, side and front walls are formed of pipes in close contact with one another and with the tube-sheet of the boiler, and arranged to form an arched roof, the highest and lowest point of the pipes in communication with the steam and water spaces of the boiler respectively, the pipes constituting the front wall of the fire-box arranged to leave a fuel-feed opening, for the purpose set forth.

6. The combination with a tubular boiler, of a fire-box the top, side and front walls of which are formed of pipes having flat contacting faces and bolt-flan ges projecting therefrom, and a packing between said contacting faces and bolt-flanges except at points alongone or both sides and above the upper face -of the grate to form air-ports; of a jacket inclosing the fire-box to form an air-chamber between the two, air-ports in the Aside wall or wallsof the jacket, means for controlling the air passing through said ports and means for connecting all the pipes at their highest and lowest points respectively with the steam and water spaces of the boiler, for the purpose set forth.

7. The combination with a tubular boiler; of a fire-box whose top, side and front walls are composed of pipes in close contact withv one another and with the tube-sheet of the boiler, rearwardly and .downwardly inclined pipes to which the lower ends of the wallpipes are connected, said rearwardly-inclined pipes connected at their rear end which lies below the water-space of the boiler with said water-space at its lowest point, means for connecting the wall-pi pes at their highest points with the steam-space of the boiler, and means at the lowest point of the inclined pipes for discharging the water therefrom and consequently from the boiler, for the purpose set forth.

one another and with the tube-sheet of the boiler, and means for connecting the lower ends of said pipes with the water-space of said boiler; of a steam-collector to which the upper end of the wall-pipes are connected, said collector in communication with the steam-space of the boiler, substantially as and for the purposeset forth.

9. The combination with a tubular boiler, its fire-box having its top side and front walls formed of pipes in close contact with one another and with the tube-sheet of the boiler, means for connecting the lower ends of said pipes with the water-space of said boiler, and a jacket encompassing the fire-box to form an air-chamber between them; of a steam-collector arranged outside the jacket and communicating with the steam-space of the boiler, and pipe connections between the upper ends of the fire-box wall-pipes and said collector, substantially/as and for the purpose set forth.

10. A locomotive-boiler provided with a fire-box whose top, side and front walls are formed by pipes in such close contact with one another and with the tube-sheet of the boiler as to form substantially air-tight walls, the highest and lowest points of said pipes respectively connected with the steam and water spaces of said boiler, a jacket inclosing the fire-box to form an airtight chamber between them; in combination with a rearwardly and downwardly inclined grate whose lowest point lies below the water-space of the boiler, a fire-bridge projecting forwardly and upwardly from the lower part of the tubesheet of the boiler into the fire-box and having longitudinal passages open at one end to the atmosphere and transverse passages leading from said longitudinal passages and opening into the fire-box, and means for admitting air to the aforesaid air-chamber and thence to the fire-box through its side wall or walls along the upper surface of the grate, for the purpose set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

JOHANN BROTAN.

Vitnesses: v

ALvEsTo I. HoGUE, AUGUST FUGGER.

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